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人教版高中《物理》第三册(必修加选修)第29面以及司南版选修3—4第99面中,教材提出了光通过不透明圆板时会在影的中心出现亮斑——“泊松亮斑”.普通光源频率范围较宽加之光波波长极短,使教师很难通过实验让学生信服这一看似荒诞而又极具理性的现象,从而形成了教学上的缺憾.笔者在光波衍射的基础上进行了多次探索、论证,设计了一个取材方便、易于操作、可多次重复的实验,取得了满意的实验效果.现把相关原理及制作、操作流程说明如下,供同行参考.
PEP High School’s “Physics” Book 3 (Compulsory and Optional) 29th Face and Sinan Edition 3-4th 99th Face, the teaching materials suggest that when light passes through an opaque circular plate, it will appear bright spots in the center of the shadow-- “Poisson bright spot”. The wide frequency range of common light sources combined with the extremely short wavelength of the light wave make it difficult for teachers to convince students through this experiment that this seemingly absurd and highly rational phenomenon has formed a deficiency in teaching. On the basis of the diffraction of light waves, the author conducted many explorations and demonstrations, and designed an experiment that is easy to use, easy to operate, and can be repeated for many times, and achieved satisfactory experimental results. Now the relevant principles, production, and operation flow are described as follows. For peer reference.